Car-truck



C. T. WESTLAKE.

CAR TRUCK.

APPLICATION FILED JULY 25,1919.

Patented Mar 15,

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CAR TRUCK.

APPLICATIONHLED JULY 25,1919.

Patented Mar. 15, 1921".

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GAE-TRUCK.

Patented Mar. 15, 1921.

' Application filed July 25, 1919." Serial No. 313,287.

To all whom it may concern:

Be it known that 1, CHARLES T. NEST: LAKE, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Car- Trucks, of which the following is a full,

clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being liad to the accompanying draw.- ings, vforming part of this specification.

ly invention relates to railway car trucks, the principal objects of my invention being to generally improve upon and simplify the construction of the existing forms of trucks of the type to which my invention relates; to provide a construction which materially increases the flexibility ofthe truck; and to provide means for distributing'the load of the car on the journals.

VJiththe foregoing and other objects in View, my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which- Figure 1 is a plan view of a car truck of my improved construction, a portion of one of the side frames there-oi"; being shown 1n horizontal section.

Fig. 2 is a side elevational view of my improved car truck.

cross section taken approxr' Fig. 3 is a mately on the line 3-3 of Fig. 1.

Fig. 4tis an enlarged vertical section taken approximately on the line 4-4 of Fig. 3. Fig. 5 is a detail section taken approximately on the line 5-5 of Fig. 3.

Fig. 6 is an enlarged elevational view of one of the rockers utilized on my improved truck.

Referring by numerals to the accompanying. drawings,

by the upper portions of coil springs 15, the

lower ends of which rest upon the tops of the ournal boxes 12. The central portion of each side frame 10 is formed with a vertically disposed boxlilre structure 16, the side walls of which are provided with openings 17 and formed in said structure below said openings is a substantially cup-shaped seat or socket 18.

The pair of side frames of each truck are connected by a relatively light transverse member or bolster 19, the ends of which are tially spherical heads 20 which bear directly upon the sockets 18. I

Formed integral with thesides of the end provided with integrally formed substan- I portions of this bolster 19 and with the sides of the heads 20 are outwardly projecting pairs of ears or lugs 21 which occupy positions immediately adjacent the inner side walls of the box-shape structures 16, and thus when ,the bolster and side frames are properly assembled, they are interlocked by means of said pairs 0% lugs or cars. However, there is SllffiClQIlll play between the innor faces of'the pairs of lugs or cars 21 and the adjacent faces of the inner walls of the structures 16 to permit the side frames to rock freely in all directions fora limited distance, such result being accomplished by virtue of the ball and socket connections between the end of the bolster and the side frames, and as a result, the truck framehas a relatively high degree of flexibility.

Formed at the center of the bolster 19 is a pocket 22 which is occupied by a compression spring 23 and supported by the latteris the central portion of a body bolster 24. Extending downwardly through the bottom' of this body bolster through the spring 23 and through the bottom of pocket 22 is a king pin 25, the same serving as an axis for the turning movement of one bolster relative to the other, and as said king pin is. provided in its lower end with a key or cotter pin 26, it serves to tie the two bolsters together.

Fixed iiiidersides of the end portions of the body bolster 24: are brackets or bearings 27, and pivotally connected thereto by means of pins or bolts 28 are rockers 29, the under surfaces of which latter bear directly on top of fiat bearing faces 30 which are formed on top of the central portions of the side frames 10. Thereis preferably a pair of these in any suitable manner to the belie: for each end of the bod bolstertruclr'frame swings beneath the body bolster or the latter swings upon the truck frame, said rockers will roll freely upon the bearing surfaces 30 in arcs of a circle, having the king pin 25' as-a center.

In. practicdl prefer to provide the cen tral portion of the lower bearing surfaces r each rocker Bil with a flat bearing face 29*, and which latter, under normal conditions, is in contact with the flat bearing face 30 on top of the truck side frame, with the result that a normally rigid truck is produced, that is, under normal conditions or while the truck is riding upon substantially straight track, the truck will maintain the same relative position with respect to the body bolster 24; and considerable force will be required to cause the rockers to roll off their flat bearing faces.

Formed integral with or fixed to the central portions of the frames 10 and above the openings that are occupied by the end por' tions of the bolster 19 are inwardly projecting brackets 31 which serve as points of attachment for the upper ends of ordinary brake hangers 32, and which latter are pivotally connected in the us-ual manner to the brake heads carried by a pair of inside hung brake beams.

My improved car truck has a relatively short wheel base, is extremely flexible owing to the manner in which the bolster member is connected to the truck side frames and the springs arranged betw en the truck and body bolsters' It will be noted that in my impro ved' truck, the ends of the truck bolster, bear directly upon the side frames and that while the ends of the bolster are constructed so as to permit universal rockingmovement f the side frames, there are no springs or resilient members between said bolster and side frames.

The greater portion of the weight of the load carriedby the car body is transmitted from the body bolster directly to the side frames of the truck through the rockers 2S) and this weight is in turn yieldingly supported by the. springs 15 which rest upon the journal boxes 12. The rockers 29 per- ,form the functions of side bearings and by providing said rockers with fiat underfaces,

the truck is, under normal conditions, practically rigid, and at.the same time when suliicient force is exerted, the rockers will act to permit the truck to swing in a ho izontal plane when passing around curred portions of the track. 3

it will be readily understood that minbr changes in the size, formandv construction of the various parts of my improved car truck can be made and substituted for those ev ess herein shown and described, without'departing from the spirit of my invention, the scope of which is set forth inrt he appended claims.-

'I claim:

1. In a car truck, a pair of spring supported side frames, a bolster pivotally connecting the same, and a car body support ing spring carried by said bolster and located adjacent to its center. i

2. 111 a car truck, a pair of spring sup ported side frames and a bolster, connections between the ends of said bolster and side frames whereby the latter have. free rocking movement fora limited distance in all directions, and a car body supporting spring'carried by said bolster.

3. In a car truck, a pair of side frames, a bolster bearing directly thereupon, a car body supporting, spring carried by said bolster, and rockers interposedbetween the side frames and a part of the car body.

4. In a car truck, a bolster, spring-supported side frames 'connected to the ends directions, a body bolster, yielding pressure means interposed betweenthe truck bolster 'and body bolster, rockers interposed between the body bolster and side frames, and portions of the bearing surfaces of said rockers being provided with fiat faces which normally engage the side frames.

6. In a car truck, a pair of Wheel carryingh axles, journal boxes for said axles, springs supported by said journal boxes, truck side frames supported by said springs, rocking supports against which the central portions of the side frames engage, a. truck bolster,

the ends of which bear directly upon said side frames, and a car body supporting s rin su ,orted u on the central ortion of said bolster. I r I 7. In. a car truck, a pair or spring supported side frames, bolster, flexible interlocking connections between the bolster and 'side frames, a body bolster, and yielding pressure means between the truck bolste and body bolster.

8. In a car truck, a pair of spring supported side frames, a bolster, interlocking means between the bolster and side frames, 0. body bolster, yielding pressure means between the truck bolster and body bolster,

and rockers between. the. body bolst'erand side frames.

9. In a'car truck, a pair of wheel car y 1. ing

axles side framesfieldin l su )orted upon 5 c rbwlstisr pivotally connes'zed tn-anal yieldia:

saic'sl males, :1 bolster havingits e113 portins flexibly connectedto said sicle frames, :1 body guppertefia gdw've saidbalster, 51ml T0 is 'between'th h "as 3,216 the and parfions of said may blamr,

10. in a: c171" truck, a, pail 0" heel an'ya body bolster pivo sally ccnnected io and yialdlngly supported above said. holster makers between the side frames the e'nfi nlofiions of said body bolster, and said roclzers being proviclecl with flat surface-s that are adapted to normally engage said side frames.

figstimony whereof I hereunto 211%; my signature this; 16th clear 0 July, 1919 V .CHARLEQ m FIESl. 

